Checkweigher Verification and Calibration Log

This template covers the full verification walk-through for an in-line checkweigher: inspection details, equipment readiness, test weight checks, reject function confirmation, calibration status, and corrective actions. It is designed to document whether the unit is accurate enough to stay in service for the current product run. It also captures who performed the check and whether QA or a supervisor reviewed any deficiency. It is not a maintenance work order or a full preventive maintenance record.

Use it at startup, after changeovers, after calibration, after maintenance, and at any scheduled verification interval defined by your quality program. It is also useful when a product has a tight weight tolerance or when the reject system is critical to preventing underweight or mispacked units from shipping. Many teams use it before the first lot of the shift and again after any stoppage that could affect the conveyor or reject timing. If the checkweigher is not in use, the log should not be used as a generic equipment checklist.

A trained operator, line lead, QA technician, or maintenance technician can complete the log, depending on your site procedure and authority to release equipment. The key requirement is that the person understands the approved test weights, tolerance limits, and reject acceptance criteria. If a calibration adjustment is needed, many sites require QA or maintenance review before the line returns to service. The log should clearly show who performed the check and who approved the outcome.

The log supports traceability and control expectations commonly found in FDA-regulated food operations and ISO 9001 quality systems. It helps show that measuring equipment was verified before use, that non-conforming product would be rejected, and that any adjustment was reviewed and documented. It does not replace formal calibration records, master equipment lists, or validation studies where those are required. For regulated environments, keep the log aligned with your site SOPs and record-retention rules.

Common mistakes include recording only a pass/fail result without the actual measured values, using test weights that do not match the approved range, and skipping reject confirmation after a successful weight check. Another frequent issue is failing to note whether the reject bin or lane actually captured the out-of-spec pack. Teams also sometimes forget to document the last calibration label or the corrective action taken when a deficiency is found. This template is built to prevent those gaps.

Yes. The template should be customized to your product’s approved tolerance range, the test weight set you use, and any customer-specific acceptance criteria. You can add fields for multiple SKU families, different pack sizes, or separate low/target/high test points if your line runs more than one nominal weight. Keep the acceptance criteria consistent with your quality plan so operators are not making ad hoc decisions at the line.

No. Verification confirms the checkweigher is performing within the expected range for the current run, while calibration is a controlled adjustment or service activity that may require qualified personnel. This log can document that a calibration adjustment was needed and that the equipment returned to service after verification. If your site requires a technician, the template should be paired with a maintenance or calibration record. Do not use the log as a substitute for formal calibration certificates where those are required.

This log works well alongside batch records, line clearance forms, non-conformance reports, and corrective action logs. If a checkweigher fails verification, the deficiency can be linked to a hold, recheck, or disposition record for affected product. Many teams also connect it to a digital QA workflow so failed checks trigger notifications to supervisors or maintenance. That makes it easier to show a complete trail from detection to correction.